We review a class of methods that can be collected under the name nonlinear transform coding (NTC), which over past few years have become competitive with best linear codecs for images, and superseded them in terms rate-distortion performance established perceptual quality metrics such as MS-SSIM. assess empirical NTC help simple example sources, optimal vector quantizer is easier to estimate t...

the s-transform has widely been used in the analysis of non-stationary time series. a simple method to obtain depth estimates of gravity field sources is introduced in this study. we have developed a new method based on the spectral characteristics of downward continuation to estimate depth of structures. this calculation procedure is based on replacement of the fourier transform with the s-tra...